Joint health becomes a major concern as horses get older. Years of carrying riders, working, or simply the passage of time can take a toll on their joints, leading to stiffness, discomfort, and less mobility.
Many senior horses show early signs of joint discomfort—such as slow warm-ups, stiffness after rest, or subtle changes in stride. Recognizing these signs early can help preserve comfort and mobility. The good news? There are joint supplements that truly support senior horses, so they can enjoy their golden years with ease.
Understanding the dynamics of joint health makes a major difference in a senior horse’s daily life. With the right supplement strategy and management, you can help keep them active, happy, and comfortable.
1. Why Senior Horses Need Joint Support
As horses age, their joints undergo gradual wear and tear—just like in people. This can lead to stiffness, reduced mobility, and signs of discomfort, especially after periods of rest or work. Osteoarthritis (OA), the most common joint disorder in horses, affects over 50% of horses over 15 and up to 90% over 30.
Early Signs of Joint Issues in Seniors May Include:
- Shorter or uneven strides
- Reluctance to change gaits or work
- Joint swelling or heat
- Behavioral changes due to discomfort
While some joint supplements can be helpful, not all ingredients are equally effective. Many traditional options, like glucosamine and chondroitin, are now under scientific scrutiny due to poor absorption and limited results in equine studies.
The most effective approach to maintaining joint health includes:
- Thoughtful exercise routines
- Maintaining proper body condition
- A diet balanced in key nutrients for cartilage and connective tissue
- Targeted use of evidence-based supplements
Always consult your veterinarian before adding any supplement, and monitor your horse closely for early signs of stiffness or discomfort.rt and work with your veterinarian to decide when to introduce a supplement. Early action often prevents long-term problems.
2. Research-Backed Ingredients
While glucosamine and chondroitin sulfate are commonly marketed for joint support, recent equine studies show limited absorption and inconsistent results. Most high-quality research does not support their effectiveness when fed to horses at typical dosages.
Instead, focus on ingredients with stronger scientific backing:
| Ingredient | Benefits | What the Research Shows |
|---|---|---|
| MSM (Methylsulfonylmethane) | Bioavailable sulfur; supports connective tissue; anti-inflammatory | Reduces oxidative stress and joint inflammation; well-absorbed and widely used in horses |
| Omega-3 Fatty Acids (DHA/EPA) | Anti-inflammatory support; promotes joint comfort | Reduces inflammatory markers and improves stride length in arthritic horses |
| Hyaluronic Acid (HA) | Improves joint fluid viscosity; reduces swelling | May reduce joint effusion and inflammation; oral absorption is debated |
| Resveratrol | Antioxidant; protects cartilage from oxidative damage | Shown to reduce lameness and oxidative stress in horses with mild joint issues |
| Avocado/Soybean Unsaponifiables | Stimulates cartilage repair; slows degradation | Improves cartilage synthesis and prevents breakdown; more equine-specific research needed |
| Glucosamine | Cartilage support; provides structural building blocks | Low bioavailability (<6%); limited proven effectiveness in horses at practical doses |
| Chondroitin Sulfate | Supports cartilage hydration and elasticity | Poorly absorbed alone; may help when paired with glucosamine, but evidence is mixed |
| Green Lipped Mussel | Marine-derived anti-inflammatory with omega-3s and GAGs | One equine study showed reduced lameness and inflammation; more research needed |
🧪 Glucosamine and Chondroitin: While safe, these ingredients have low bioavailability (<6%) and inconsistent outcomes in horses. Most positive findings come from human or lab-based studies using much higher doses than found in equine products.
Other Joint Support Supplements
In addition to the core ingredients commonly found in equine joint supplements, a number of other compounds are believed to support joint health—though most have not been thoroughly studied in horses. Much of the evidence for these comes from research in humans or other animal species.
These ingredients are frequently included in joint or comfort formulas and may offer potential benefits:
- Vitamins C, E, and A – Known for their antioxidant properties; often paired with trace minerals like copper, selenium, and manganese to support tissue repair and immune function.
- Curcumin – The active compound in turmeric, recognized for its anti-inflammatory and antioxidant effects.
- CBD Oil (Cannabidiol) – A non-psychoactive extract from cannabis that may help manage discomfort in horses, though more equine-specific research is needed.
- Rose Hip – Rich in vitamins A, D, and E, as well as fatty acids and flavonoids that may help reduce inflammation.
- Boswellia serrata (Indian Frankincense) – A plant extract with anti-inflammatory effects, commonly used in joint support blends.
- Capsaicin – Derived from chili peppers, this compound may help reduce joint pain and is sometimes used topically for relief.
- Collagen – A structural protein found in cartilage and connective tissues; supplementation may promote collagen synthesis and joint integrity.
- Cetyl Myristoleate – A fatty acid derivative with potential anti-inflammatory and lubricating properties, though studies in horses are lacking.
- Devil’s Claw (Harpagophytum) – An herb traditionally used for pain relief; limited scientific data exists on its effectiveness in horses.
- Cissus quadrangularis – A medicinal plant long used in traditional Asian medicine, thought to support bone and connective tissue health.
As always, consult with your veterinarian or equine nutritionist before introducing new supplements to ensure they’re appropriate for your horse’s specific needs and won’t interfere with existing treatments.
3. Best Joint Supplements for Senior Horses According to Horse Owners
Cosequin ASU:
Cosequin® is the #1 veterinarian recommended joint health supplement brand*. Cosequin ASU is veterinarian formulated with avocado/soybean unsaponifiables (ASU), glucosamine, chondroitin sulfate, methylsulfonylmethane (MSM), and boswellia serrata extract to provide joint health support for equine athletes
⭐ Rating: 4.7 out of 5 stars (300+ reviews on Amazon)
💰 $65.99 ($3.77 / ounce) – 500g (1.1lb)
💰 $139.99 ($3.03 / ounce) – 1300g (2.86lbs)
| Ingredient | Amount per 2 Scoops – 32.4g |
|---|---|
| Glucosamine Hydrochloride | 14,400 mg |
| Methylsulfonylmethane (MSM) | 10,000 mg |
| Chondroitin Sulfate | 2,400 mg |
| Avocado/Soybean Unsaponifiables (ASU) | 2,100 mg |
| Boswellia serrata Extract | 560 mg |
| Manganese | 100 mg |
⭐ Rating: 4.8 out of 5 stars (200+ reviews on Amazon)
💰 $144.99 ($3.92 / ounce) – 1050g (2.3lbs)
| Ingredient | Amount per 2 scoops – 34g |
|---|---|
| Glucosamine Hydrochloride | 14,400 mg |
| Methylsulfonylmethane (MSM) | 10,000 mg |
| Sodium Chondroitin Sulfate | 2,400 mg |
| Avocado/Soybean Unsaponifiables (ASU) | 2,100 mg |
| Boswellia serrata Extract | 560 mg |
| Sodium Hyaluronate (Hyaluronic Acid, HA) | 100 mg |
| Total Catechins (Green Tea Extract) | 30 mg |
SmartFlex Senior:
SmartFlex® Senior Pellets are a highly rated joint supplement formulated specifically for aging horses.
This supplement targets stiffness, inflammation, and joint discomfort. It also includes antioxidants and amino acids to support overall mobility and comfort. Palatable and easy to feed, it’s a popular choice for maintaining senior horses’ soundness and quality of life.
| Ingredient | Per 60 g – Scoop |
|---|---|
| Methylsulfonylmethane (MSM) | 12,000 mg |
| Glucosamine HCl (Shellfish) | 7,000 mg |
| Devil’s Claw Extract (Harpagophytum procumbens) | 1,750 mg |
| Vitamin C (Ascorbic Acid) | 750 mg |
| Boswellia serrata Extract | 500 mg |
| Chondroitin Sulfate | 500 mg |
| DL‑Phenylalanine | 300 mg |
| Superoxide Dismutase | 100 mg |
| Sodium Hyaluronate (Hyaluronic Acid, HA) | 50 mg |
⭐ Rating: 4.7 out of 5 stars (1600+ reviews on SmartPak)
💰 $56.19 ($2.01 / day) – 1.7kg (3.4lb Bag) SmartPak
💰 $95.74 ($1.71 / day) – 3.3kg (7.4lb Bag)
💰 $179.95 ($1.61 / day) – 6.7kg (14.8lb Bag)
💰 $336.79 ($1.50 / day) – 13.4kg (29.6 lb Bag)
*This product contains one or more ingredients currently published by US Equestrian as a prohibited substance. Please consult the governing body for this and any other organizations under which you may compete Learn More about Supplement Guidelines for Performance Horses
SmartFlex Senior (Herb-Free):
SmartFlex® Senior Pellets are a highly rated joint supplement formulated specifically for aging horses, but this herb-free version is perfect for older horses that are still competing.
This supplement also targets stiffness, inflammation, and joint discomfort. But it adds a bit extra for the sporty senior horse. Palatable and easy to feed.
| Ingredient | Per 60 g – Scoop |
|---|---|
| Methylsulfonylmethane (MSM) | 12,000 mg |
| Glucosamine HCl (Shellfish) | 8,000 mg |
| Vitamin C (Ascorbic Acid) | 750 mg |
| Chondroitin Sulfate | 700 mg |
| DL‑Phenylalanine | 500 mg |
| Superoxide Dismutase | 100 mg |
| Sodium Hyaluronate (Hyaluronic Acid, HA) | 75 mg |
⭐ Rating: 4.7 out of 5 stars (350+ reviews on SmartPak)
💰 $62.44 ($2.23 / day) – 1.7kg (3.4lb Bag) SmartPak
💰 $105.21 ($1.88 / day) – 3.3kg (7.4lb Bag)
💰 $199.95 ($1.79 / day) – 6.7kg (14.8lb Bag)
*With SmartPak, if you choose autoship to get a recurring order then you save 5% on all products.
MadBarn MSM:
Another option could be buying pure MSM, research shows that MSM supports joint health by acting as an antioxidant and anti-inflamatory mediator.
This product supports joints and connective tissue, improves post-exercise, and acting as a natural antioxidant, it will help maintain your senior horses comfortable.
| Ingredient | Per 10 g – 1 1/2 Scoop |
|---|---|
| Methylsulfonylmethane (MSM) | 10,000 mg |
*With MadBarn, you can also choose autoship to get a recurring order then you save 5% on all products.
⭐ Rating: 4.9 out of 5 stars (350+ reviews on MadBarn)
💰 $21.99 ($0.22 / day) – 1kg (2.2lb Bag) 100 servings
💰 $43.98 ($0.22 / day) – 2kg (4.4lb Bag) 200 servings
💰 $99.99 ($0.20 / day) – 5kg (11lb Bag) 500 servings
MadBarn W-3 Oil:
W-3 Oil is designed as an energy and essential fatty acid supplement to support cardiovascular function, skin, joint health and weight maintenance.
This product is very palatable and will supply cool calories to exercising horses and hard keepers.
| Ingredient | Per 100 mL |
|---|---|
| Proprietary Blend of Soybean, flax and DHA Oil | 99 mL |
| DHA (minimum) | 1500 mg |
| Vitamin E (d-alpha-tocopherol) | 1000 mg |
*With MadBarn, you can choose autoship to get a recurring order then you save 5% on all products.
⭐ Rating: 4.6 out of 5 stars (900+ reviews on MadBarn)
💰 $66.99 ($1.34 / day) – 5L 50 servings
💰 $133.98 ($1.34 / day) – 2 x 5L 100 servings
💰 $228.99 ($1.14 / day) – 20L 200 servings
LubriSynHA Plus MSM:
An easy-to-use liquid is simply top-dressed on food once a day and LubriSyn states that results are seen in 7 to 10 days.
Hyaluronic Acid is meant to be hydrated, so the liquid formula is readily absorbed and metabolized, unlike some pills or powders.
This product is for the older horse that suffers from joint pain or the competition athlete that needs joint protection.
| Ingredient | Per 15 mL – 1 Pump |
|---|---|
| Methylsulfonylmethane (MSM) | 150 mg |
| Sodium Hyaluronate (Hyaluronic Acid, HA) | 75 mg |
⭐ Rating: 4.6 out of 5 stars (500+ reviews on Amazon)
| 💰 $31.49 (8oz) – 2 weeks | View 8 oz |
| 💰 $56.69 (16oz) – 1 month | View 16 oz |
| 💰 $105.29 (32oz) – 2 months | View 32 oz |
| 💰 $167.36 (64oz) – 4 months | View 64 oz |
| 💰 $299.69 (128oz) – 8 months | View 128 oz |
4. Choosing and Using Joint Supplements Wisely
- Check ingredients: Look for clinical backing, not filler blends.
- Pick the right form: Liquid = fast absorption, pellets = convenience, powders = value.
- Stick with it: Give 4–6 weeks before evaluating effectiveness.
- Combine with good care: Turnout, healthy weight, hoof care, and vet checkups all matter.
5. Know When to Call the Vet
- Sudden or severe lameness
- Heat, swelling, or visible pain
- Appetite changes or reluctance to move
- Behavior or energy changes
Takeaway
When it comes to feeding senior horses, supporting longevity and healthy aging requires a thoughtful, well-rounded approach. Meeting their core nutritional needs, providing quality supplements, and maintaining routine veterinary care are all essential for keeping older horses comfortable and thriving.
Helping senior horses flourish means combining early intervention with attentive daily management. Watch closely for subtle changes, involve your veterinarian, and don’t underestimate the impact of small adjustments. With the right care, you can help your horse enjoy the rest of his career or retirement.
*Here’s a little transparency: Our website contains affiliate links. This means if you click and make a purchase, we may receive a small commission. Don’t worry, there’s no extra cost to you. It’s a simple way you can support our mission to bring you quality content **
References
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